Hillary Clinton is continuing to hammer Sen. Bernie Sanders
(I-Vermont) on his positions on gun rights, even as Sanders
attempts to move left on the issue.

In a Sunday CNN interview, Clinton took an unprompted shot at
Sanders on the issue.

She told host Jake Tapper that she was "pleased" that
Sanders had apparently reversed his support for legislation that
shields gun manufacturers from lawsuits brought by victims
of gun violence.

"I'm very pleased that he flip-flopped on the immunity
legislation," Clinton said. "Now I hope he will flip-flop on what
we call the Charleston loophole, and join legislation to close
that, because it's been a key argument of my campaign that we
Democrats, in fact, Americans need to stand up to the gun lobby
and pass comprehensive common-sense gun measures that will make
America safer."

Sanders supported a 2005 bill that granted relative immunity to
gun manufacturers and distributors from lawsuits brought by
family members of victims of gun violence. He has said that such
lawsuits could hurt small gun-store owners who he does not believe should be held
responsible. But this week, his campaign clarified that
he'd support a new bill that would largely reverse the
2005 legislation.

For his part, Sanders appeared on CNN just minutes after
Clinton. In his appearance, he criticized the Clinton campaign
for attempting to cast him as friendly with the gun
industry.

"I resent very much the Clinton camp saying I'm in the [National
Rifle Association] lobby. I have a D-minus — that's D as in
David — D-minus voting record," Sanders said, referring to
the NRA's grades for each member of Congress, based on how
they vote on certain gun legislation.

Sanders also denied that he flip-flopped. He said he had long
supported legislation reexamining the 2005 law to determine
whether it could be rewritten to ensure that gun manufacturers
are not knowingly selling weapons in that could
easily be distributed to criminals.

"This is a position that I've had for several months," Sanders
said.

Clinton's comments on Sunday come as multiple polls find her and
Sanders locked in a tight race in New Hampshire and Iowa, the
first two nominating states.

"The race is tightening,"
a top Democratic strategist told Business Insider. "And the
reason that you know that it is tightening is that in the last
week, I’ve seen more attacks from Clinton and pro-Clinton group
on Bernie Sanders than in the months prior combined. There’s been
a lot more communication among Clinton supporters, more talking
points — they’ve just been more aggressive."